Black Screen - Redmi Note 2 Doesn't Start Anymore

Discussion in 'Xiaomi Redmi Note 2' started by matthias, Feb 25, 2016.

  1. matthias

    matthiasMembers

    Feb 25, 2016
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    #1matthias,Feb 25, 2016
    Last edited: Feb 25, 2016
    Hello,
    this morning I unlocked my Redmi Note 2 and it was lagging a bit (as it is sometimes) so I just lay it down for a while and did something else. When I returned I couldn't unlock the phone or see anything. I also tried to put out the battery and put it back in - this always worked but it didn't this time. Also tried to boot in recovery and fast boot mode. Nothing.
    When I connect it to to my computer (Windows 7) I hear the "device connected" sound and an "Unknown Device" in the device manager. A few seconds after, I hear a "device disconnected"/"device installation failed" sound and it disappears from the device manager list. This repeats every 10-15 seconds.
    Just to be clear: I do not see anything on the screen (no background light as well), the touch buttons remain off, no vibration, nothing. Looks like bricked though I am wondering why it is recognized as an unknown device in windows...

    I tried Mi PC Suite but it didn't work...

    What can I do? I also couldn't find a way to find an official repair shop. Where can I send my phone back? To ******* (where I bought it)? I live in Germany and I'm not sure if there is any phone shop that can fix it...

    Thank you and best wishes,
    Matthias
     
  2. nickzeptepi

    Feb 12, 2016
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    Pull out battery and replace, charge with phone off. Do you see the percentage when u first connect ?
    Charge and try boot again

    Sent from my Redmi Note 2 using Tapatalk
     
  3. matthias

    matthiasMembers

    Feb 25, 2016
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    Hello nick,
    Thank you for your fast reply! Connecting it to the charger/Windows PC with battery pulled out didn't work as well.
    Same strange behavior with the device manager...
    The screen shows absolutely no activity, so no charge icon/percentage as well.
    I charged the battery tonight, my multimeter says it has 4.28V.

    By the way: I tried to connect it to a digital power supply control with 3.70V. When starting, it draws around 440mA and after a while goes down to 140mA, then up again.
    I suppose it is a Hardware failure with the mainboard/screen unit(?) or a boot error... However, I wonder why I even can't see the touch button backlights and feel the vibration on startup.
    Any other ideas or programs I could use to unbrick my phone? :/

    How can I let it repair by Xiaomi?

    Best wishes,
    Matthias
     
  4. silas guo

    silas guoMembers

    Aug 1, 2014
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    You can try to replace the battery.If it still has problem, maybe the mainboard has problem.
    Redmi note 2 battery is available in dragon-tt.com.
     

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